fox-ess.sh

#!/usr/bin/env ruby

require 'net/http'
require 'uri'
require 'digest/md5'
require 'json'
require 'byebug'

key = ARGV[0]
abort("key is required") if key.nil?

start = Time.now.to_i

host = "https://www.foxesscloud.com"
token = "get token at https://www.foxesscloud.com/user/center"

lang = "en"
path = "/op/v1/device/real/query"

timestamp = start * 1000
signature = "#{path}\\r\\n#{token}\\r\\n#{timestamp}"
signature = Digest::MD5.hexdigest(signature)

uri = URI("#{host}#{path}")
req = Net::HTTP::Post.new(uri)
req['token'] = token
req['timestamp'] = timestamp
req['lang'] = lang
req['signature'] = signature
req['Content-Type'] = 'application/json'

payload = JSON.dump({"sns": ["SNS of your inverter"]})
req.body = payload

body = nil

cache_file = "response_#{start}.json"
if File.exist?(cache_file)
  body = File.read(cache_file)
else
  Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) do |http|
    response = http.request(req)
    body = response.body
    File.write(cache_file, body)
  end
end

result = JSON.parse(body)
datas = result['result'][0]['datas']
values = datas.map { |h| [h['variable'], h['value']] }.to_h

puts values[key].to_f